content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * -----------
   * Values.java
   * -----------
   * (C) Copyright 2001-2008, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes:
   * --------
   * 08-Nov-2001 : Version 1 (DG);
   * 23-Oct-2002 : Renamed getValueCount --> getItemCount (DG);#
   * ------------- JFREECHART 1.0.x ---------------------------------------------
   * 02-May-2006 : Updated API docs (DG);
   *
   */
  
  package org.jfree.data;
  
  /**
   * An interface through which (single-dimension) data values can be accessed.
   */
  public interface Values {
  
      /**
       * Returns the number of items (values) in the collection.
       *
       * @return The item count (possibly zero).
       */
      public int getItemCount();
  
      /**
       * Returns the value with the specified index.
       *
       * @param index  the item index (in the range <code>0</code> to
       *     <code>getItemCount() - 1</code>).
       *
       * @return The value (possibly <code>null</code>).
       *
       * @throws IndexOutOfBoundsException if <code>index</code> is not in the
       *     specified range.
       */
      public Number getValue(int index);
  
  }
  